– Renault's Head of Track Operations Rémi Taffin says he is encouraged by the progress made by the four teams supplied by their power units, but concedes that improvements are still required. Red Bull and Toro Rosso completed a fairly problem free day, with reigning world champion Sebastian Vettel setting the fourth quickest time. Conversely, there were problems for Caterham and Lotus as neither team completed significant running across the two practice sessions. "Our aim was to complete as much running as possible to add to our bank of information. We achieved this with some teams, but with others we fell short," he said. "We were clearly encouraged by Red Bull’s...
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